you can purchase a special in-game currency: Gold. It can ease your progress along the Tech Tree. Gold is a great opportunity to make playing the game even more enjoyable and reach the desired target much faster.
*CAUTION: This product is intended for computers*
How to redeem World of Warships cards:
1- Go to the link and login ( https://eu.wargaming.net/shop/redeem/ )
2- Enter the card code that you got.
3- Click on “redeem”